KVM: SVM: add tracing support for TDP page faults

To distinguish between real page faults and nested page faults they should be
traced as different events. This is implemented by this patch.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 8953292..218949c 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1011,6 +1011,10 @@ static int pf_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
                KVMTRACE_3D(PAGE_FAULT, &svm->vcpu, error_code,
                            (u32)fault_address, (u32)(fault_address >> 32),
                            handler);
+       else
+               KVMTRACE_3D(TDP_FAULT, &svm->vcpu, error_code,
+                           (u32)fault_address, (u32)(fault_address >> 32),
+                           handler);
 
        return kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code);
 }

diff --git a/include/asm-x86/kvm.h b/include/asm-x86/kvm.h
index 80eefef..6f18408 100644 (file)
--- a/include/asm-x86/kvm.h
+++ b/include/asm-x86/kvm.h
@@ -228,5 +228,6 @@ struct kvm_pit_state {
 #define KVM_TRC_CLTS             (KVM_TRC_HANDLER + 0x12)
 #define KVM_TRC_LMSW             (KVM_TRC_HANDLER + 0x13)
 #define KVM_TRC_APIC_ACCESS      (KVM_TRC_HANDLER + 0x14)
+#define KVM_TRC_TDP_FAULT        (KVM_TRC_HANDLER + 0x15)
 
 #endif